Final answer:
The discount for using cash instead of a credit card on a $150 purchase is $1.18125.
Step-by-step explanation:
The discount for using cash instead of a credit card on a $150 purchase can be calculated by finding 1.75% of $150 and then taking 45% of that amount.
Step 1: Find the processing fee for using a credit card:
1.75% of $150 = $2.625
Step 2: Calculate the discount:
45% of $2.625 = $1.18125
Therefore, the discount for using cash instead of a credit card on a $150 purchase is $1.18125.